An apparatus for generating a noise sound, which is equipped in industrial electric cars with little or no driving sound and generates an appropriate amount of noise sound so that the nearby cars or pedestrians can notice their approch in a narrow pathway or stock room. The apparatus has a cornical air collector (1) installed in the car, a shutter (5) installed rotatably in the air collector (1) and controls the flow amount of air passing through the air collector (1), and a U-shaped tube (4) installed apart by a predetermined distance from a small diameter portion (9) of the air collector (1) and generates the noise sound by the air discharged from the air collector.